US7552949B2 - Joint restraint for pipe fittings - Google Patents
Joint restraint for pipe fittings Download PDFInfo
- Publication number
- US7552949B2 US7552949B2 US11/272,014 US27201405A US7552949B2 US 7552949 B2 US7552949 B2 US 7552949B2 US 27201405 A US27201405 A US 27201405A US 7552949 B2 US7552949 B2 US 7552949B2
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- US
- United States
- Prior art keywords
- shell
- pipe
- ring
- joint
- arms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/26—Couplings of the quick-acting type in which the connection is made by transversely moving the parts together, with or without their subsequent rotation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
Definitions
- the present invention relates to a joint restraint for pipe fittings and particularly relates to an assembly useful for joining a fitting and a pipe enabling the transfer of thrust loads between the fitting and pipe.
- T-fittings are generally connected at opposite ends to pipes and also to a lateral pipe.
- Other types of fittings include reducers where the fitting is used to reduce the flow diameter from one pipe to another.
- reducers where the fitting is used to reduce the flow diameter from one pipe to another.
- Gasketed joints often do not transfer such structural loadings. Joint restraints, however, are typically used on pipe joints and are specifically designed to resist the thrust force at the fitting.
- a joint restraint for coupling a pipe and a fitting wherein loadings, e.g., axial thrust forces, are transferred between the fitting and the pipe reducing any need for thrust blocks or other mechanisms at the installation site for reacting the thrust loads into the surrounding environment.
- the joint restraint includes a shell having a pair of arms for engaging behind lateral lugs projecting from the fitting.
- the shell also includes a lateral opening for receiving the radially projecting flanges of a clamp ring received within the interior of the shell.
- the ring serves as a stop for the shell precluding axial movement of the fitting from the pipe.
- the engagement of the shell arms and the lugs on the fitting preclude axial movement of the pipe from the fitting.
- the pipe and the fitting are restrained from axial movement relative to one another by transfer of loads from one to the other through the shell and clamp ring. It will be appreciated that the joint restraint is compact and may be handled as a single unit requiring only one actuation, i.e. turning a bolt, to secure the clamp ring to the pipe.
- the joint restraint is modular as it can be used on any compatible existing fitting, is inexpensive to manufacture and is low in cost in comparison with prior joint restraints.
- FIG. 1 is a perspective view of a fitting joining two axially aligned pipes and a lateral pipe to one another using a joint restraint system according to the present invention
- FIG. 2 is a perspective view of a clamp ring forming part of the joint restraint hereof;
- FIG. 3 is a perspective view of a shell forming part of the joint restraint hereof;
- FIGS. 4 , 5 and 6 illustrate respective steps in the assembly of the joint restraint to the fitting and pipe
- FIG. 7 is a fragmentary enlarged cross-sectional view illustrating the joint restraint hereof in an assembled condition with the fitting and pipe.
- FIG. 1 there is illustrated a pipe joint generally designated 10 which, in the illustrated embodiment, includes a Tee-shaped fitting 12 having bells 14 at axially aligned opposite ends for receiving the ends of axially aligned pipes 16 .
- Fitting 12 also has a bell 14 for receiving the end of a lateral pipe 18 .
- each of the bells 14 is a substantially cylindrical, closed-periphery fitting that includes a pair of laterally (i.e., radially outwardly) extending lugs 20 .
- the fitting 12 is of a standard construction and the fitting as well as the pipes 16 and 18 may be formed of any conventional materials, for example, cast iron as used in underground piping systems.
- the rigid pipes 16 and 18 are coupled to the respective bells 14 of the fitting 12 by joint restraints generally designated 22 .
- each of the joint restraints 22 includes a grip or clamp ring 24 and a shell 26 .
- the grip ring 24 constitutes a split ring terminating short of a full 360° circle in a pair of radially outwardly projecting flanges 27 .
- the interior surface of the split ring 24 has serrations 28 for facilitating engagement and securement of the clamp ring to the pipe end which is receivable in the joint restraint for coupling the pipe and fitting to one another.
- the flanges 27 have openings 30 for receiving a bolt 32 ( FIGS.
- a nut 36 may be applied to draw the flanges 27 toward one another and secure the clamp ring 24 about the pipe end.
- one of the openings through the flanges 27 may be screw-threaded for cooperation with the threads on a bolt whereby a nut 36 , while preferable, is not required to secure the grip ring about the pipe end.
- the shell 26 includes an annulus having a cylindrical wall 38 and a radially inwardly directed flange 40 at one end of shell 26 . It will be appreciated that while a continuous flange 40 is illustrated and is preferable, a series of flanges spaced circumferentially one from the other about the shell may be utilized.
- Shell 26 also includes a radial opening 42 . Opening 42 is open at the end of the shell 26 opposite the flange 40 . Opening 42 is sized to receive the flanges 27 of the grip ring 24 which ring 24 is inserted axially into shell 26 and prior to drawing the flanges toward one another to secure the grip ring about the pipe end.
- Shell 26 also includes a pair of arms 44 .
- the arms 44 are carried on axially extending extensions 45 at locations spaced radially outwardly of the cylindrical surface 38 .
- the extensions 45 extend axially in a direction away from the flange 40 .
- the arms 44 preferably integrally formed with the extensions 45 and shell 26 , project in a generally tangential direction and are located such that the lugs 20 of the bells may be received between the arms 44 and the annular end face of the shell 26 remote from flange 40 .
- the grip ring 24 is located axially within the cylindrical sleeve 38 of shell 26 .
- the flanges 27 of the grip ring are received in the radial opening 42 of shell 26 and project radially outwardly from shell 26 as illustrated in FIG. 4 .
- the radial opening 42 lies generally medially between the extensions 45 and hence the arms 44 .
- the shell and grip ring are oriented with the flanges 27 projecting radially such that the shell 26 can be displaced radially into axial alignment with the fitting with the arms 44 engaging behind the lugs 20 of the bell 14 , i.e., the arms engage sides of the lugs facing axially away from the shell. Note that there is no requirement for any seal between the shell or grip ring on the one hand, and the bell on the other hand.
- an end of a pipe e.g., pipe 16 or 18
- a pipe end is inserted into the joint restraint 22 and into the bell 14 as illustrated in the cross-sectional view of FIG. 7 .
- a block 50 maintaining the flanges 27 spaced from one another enabling insertion of the pipe end into the bell is removed.
- the flanges 27 are then drawn toward one another by inserting the bolt 32 and threading the bolt on the nut 36 .
- the serrations 28 of the grip ring 24 engage the pipe end securing the pipe end and grip ring against relative axial movement.
- annular gasket 54 is provided as conventional along the interior surface of the bell which seals about the pipe end in the final configuration of the joint.
- axial movement of the pipe end in either axial direction is prevented.
- withdrawing movement of the pipe end from the bell 14 is prevented by the engagement of the clamp ring 24 against the flange 40 of the shell 26 which, in turn, is secured to the bell 14 by the arms 44 engaging lugs 20 .
- Withdrawing movement of the fitting from the bell in the opposite axial direction is precluded by engagement of the lugs 20 and arms 44 and the engagement of the flange 40 against an end face of the clamp ring 24 .
- axial thrust forces tending to separate the bell and pipe end from one another are reacted substantially within the joint per se which in most cases eliminates any need for thrust blocks or other types of axial restraints.
- the joint is formed by using only two component parts, i.e., the grip ring and the shell, as well as only a single bolt for securing the pipe end to the bell.
- the orientation of the radial opening 42 and flanges 27 enables location of the flanges and bolt on an upwardly facing portion of the joint restraint where visual inspection of the joint may be readily obtained from above the joint. Also in that orientation, the engagement of the arms and lugs may be viewed from above the joint.
- the grip ring is rotatable relative to the shell to a limited extent and is self centering with respect to the axis of the pipe end and the bell of the fitting.
- the present invention provides a single split ring which automatically centers itself about the pipe upon its securement to the pipe end.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
Abstract
Description
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/272,014 US7552949B2 (en) | 2005-11-14 | 2005-11-14 | Joint restraint for pipe fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/272,014 US7552949B2 (en) | 2005-11-14 | 2005-11-14 | Joint restraint for pipe fittings |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070108766A1 US20070108766A1 (en) | 2007-05-17 |
US7552949B2 true US7552949B2 (en) | 2009-06-30 |
Family
ID=38040001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/272,014 Active 2026-08-14 US7552949B2 (en) | 2005-11-14 | 2005-11-14 | Joint restraint for pipe fittings |
Country Status (1)
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US (1) | US7552949B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090051166A1 (en) * | 2007-05-17 | 2009-02-26 | Murray Corporation | Clamp-fitting stop |
US20100244437A1 (en) * | 2009-03-25 | 2010-09-30 | Securus, Inc. | Pipe joint restraint |
US20100253065A1 (en) * | 2007-11-27 | 2010-10-07 | Rinaldo Lotti | Secure coupled tube assembly |
US20110248203A1 (en) * | 2010-04-08 | 2011-10-13 | Honeywell International Inc. | Aircraft valve assemblies including clamp-specific baulking tab arrays and methods for the manufacture thereof |
US9995253B2 (en) * | 2016-07-27 | 2018-06-12 | GM Global Technology Operations LLC | Air duct system |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10677381B2 (en) | 2017-04-19 | 2020-06-09 | Mueller International, Llc | Joint restraint device |
US11199280B2 (en) | 2017-04-19 | 2021-12-14 | Mueller Intemational, LLC | Joint restraint device |
US11131412B2 (en) | 2017-04-19 | 2021-09-28 | Mueller International, Llc | Joint restraint device |
US11215306B2 (en) | 2017-04-19 | 2022-01-04 | Mueller International, Llc | Joint restraint device |
US10941887B2 (en) | 2017-07-13 | 2021-03-09 | Mueller International Llc | Wide range coupling |
US11193609B2 (en) | 2018-02-28 | 2021-12-07 | Mueller International, Llc | Pipe coupling |
US11473705B2 (en) | 2018-08-22 | 2022-10-18 | Mueller International, Llc | Joint restraint device |
US10774508B2 (en) | 2018-09-04 | 2020-09-15 | Mueller International, Llc | Hydrant shoe assembly |
US11162621B2 (en) | 2019-02-04 | 2021-11-02 | Mueller International, Llc | Gland assembly |
US11396965B2 (en) | 2019-07-19 | 2022-07-26 | Mueller International, Llc | Restraint gripper cover with lockout breakaway |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092036A (en) | 1975-12-15 | 1978-05-30 | Kabushiki Kaisha Suiken | Pipe junction holder |
US4336959A (en) | 1980-06-19 | 1982-06-29 | Uni-Flange Corporation | Joint restrainer system |
US5456784A (en) * | 1993-08-31 | 1995-10-10 | Dayco Products, Inc. | Hose construction and method of making the same |
US5632513A (en) * | 1994-01-24 | 1997-05-27 | Bks Company | Lap joint between flex hose and rigid pipe |
-
2005
- 2005-11-14 US US11/272,014 patent/US7552949B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092036A (en) | 1975-12-15 | 1978-05-30 | Kabushiki Kaisha Suiken | Pipe junction holder |
US4336959A (en) | 1980-06-19 | 1982-06-29 | Uni-Flange Corporation | Joint restrainer system |
US5456784A (en) * | 1993-08-31 | 1995-10-10 | Dayco Products, Inc. | Hose construction and method of making the same |
US5632513A (en) * | 1994-01-24 | 1997-05-27 | Bks Company | Lap joint between flex hose and rigid pipe |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090051166A1 (en) * | 2007-05-17 | 2009-02-26 | Murray Corporation | Clamp-fitting stop |
US20100253065A1 (en) * | 2007-11-27 | 2010-10-07 | Rinaldo Lotti | Secure coupled tube assembly |
US8398121B2 (en) * | 2007-11-27 | 2013-03-19 | Legris Sas | Secure coupled tube assembly |
US20100244437A1 (en) * | 2009-03-25 | 2010-09-30 | Securus, Inc. | Pipe joint restraint |
US9534718B2 (en) | 2009-03-25 | 2017-01-03 | Securus, Inc. | Pipe joint restraint |
US9556989B2 (en) | 2009-03-25 | 2017-01-31 | Securus, Inc. | Pipe joint restraint |
US10927988B2 (en) | 2009-03-25 | 2021-02-23 | Reliance Worldwide Corporation | Pipe joint restraint |
US20110248203A1 (en) * | 2010-04-08 | 2011-10-13 | Honeywell International Inc. | Aircraft valve assemblies including clamp-specific baulking tab arrays and methods for the manufacture thereof |
US8657255B2 (en) * | 2010-04-08 | 2014-02-25 | Honeywell International Inc. | Aircraft valve assemblies including clamp-specific baulking tab arrays and methods for the manufacture thereof |
US9995253B2 (en) * | 2016-07-27 | 2018-06-12 | GM Global Technology Operations LLC | Air duct system |
Also Published As
Publication number | Publication date |
---|---|
US20070108766A1 (en) | 2007-05-17 |
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AS | Assignment |
Owner name: HARRINGTON CORPORATION, THE, VIRGINIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RIORDAN, III, JOHN E.;ROUTON, SEAN B.;REEL/FRAME:017536/0523 Effective date: 20060206 Owner name: HARRINGTON CORPORATION, THE,VIRGINIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RIORDAN, III, JOHN E.;ROUTON, SEAN B.;REEL/FRAME:017536/0523 Effective date: 20060206 |
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Owner name: HARCO FITTINGS LLC, VIRGINIA Free format text: CERTIFICATE OF CONVERSION;ASSIGNOR:THE HARRINGTON CORPORATION;REEL/FRAME:064808/0151 Effective date: 20220325 |